Neuroticism has frequently been associated with Chronic Fatigue Syndrome (CFS). Other studies have shown that CFS patients are less extraverted than non-CFS patients, although the results are inconsistent. The objective of this study is twofold: To assess the personality profile of adults with CFS under the AFFM and to test the discriminant validity of the ZKPQ. The CFS group consisted of 132 consecutive patients. A cross-validation procedure, using logistic regression, was executed. Low levels on Activity and high on Neuroticism-Anxiety showed the best discriminant capacity between CFS and controls. The results of this study are concordant with previous literature on the relevance of Neuroticism in CFS characterization, but it extends the scarce existing literature in a significant manner in relation to the Activity trait. For a better conceptualization of this medical condition, we encourage researchers to take into account the facets of Extraversion rather than the dimension itself.

Its annoying they spend money on bullshit like this.. this is the equalivant of doing a study on cancer patients and then saying they are more neurotic. Maybe we do worry about things more but we have too.. overdo things and we can end up having to spend a week or two in bed!!

I thought extrovertism was more prominent and accepted in Latin cultures, while introvertism was more prominent and accepted in, for example, Japan and Scandinavian countries. What kind of cultural judgements are researchers in Spain making? How are they normalising and enforcing "Extrovert Imperialism"?

Sigh... In other news, scientists discover that when severely injured, bears mysteriously retreat to their caves and growl when repeatedly poked with sharp sticks...

A personality profile of 'researchers' who insist on 'researching' complete nonsense would be interesting. I

f an illness makes you housebound, takes all your energy and leaves you in dreadful pain it is not rocket science to realise that it would also leave you more introverted and concerned about your health than before.